Heat-utilizing garbage-furnace.



Patented Apr. I6, |90I.v J. C. H. STUT.

HEAT UTILIZING GARBAGE FURNAGE.

(Application filed Dec. 11, 1899.1

(No Model.)

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HEAT UTILIZING GARBAGE FURNACE.

(Application med Dec. 11, 1899.)

(um model.)

Patented Apr. I6, I90I..

W/TNESSES #www /N VE N 70H A 'A TTORNEK YNrrnn nfrnnr Orrrcn.

JOHN C. I'I. STUT, OF OAKLAND, CALIFORNIA, ASSIGNOR OF ONE-HALF TO JOHN L. HOWARD, OF SAME PLACE.

HEATWUTIILIZING GARBAGEMFURNACE.

SPECIFICATION forming part of Letters Patent No. 672,242, dated Apen i, 190i.

Application iiled December 11,1899. Serial No. 739,970. (No model To 1f/ZZ whom t may conoci/'1a.' opening e, Figs. 1 and 3, with the space or Beit known that I, JOHN O. H. STUT, a citiash-pit under the grate-bars, said opening bezen of the United States, residing at Oakland, ing controlled by a damper e', Fig. l, operin the county of Alameda, State of California, ated by a handle e2.

5 have invented certain new and useful Im- On the sides of the furnace-chamber are 55 provements in Heat-Utilizing Garbage-Furpassages F, Figs. 3 and 10, which communinaces; and I do hereby declare the following cate with the ash-pit and have in their inner to be a full, clear, and exact description of the wall-plates f the openings f', Figs. 1, 9, and same. 10, whereby the air, in addition to passing up Io My invention relates to that class of furthrough the bars, passes also into the mass of 6o naces designed for consuming garbage, with material from the sides above the bars. the further intent of utilizing the heat for Through the forward part of the arch of useful work--as, for example, making steam. the furnace-chamber are made a number of My invention consists in the construction openings c', which communicate with a cham- 15 and arrangement of a furnace of this class, ber G just above, which serves as a combus- 65 which I shall hereinafter fully describe and tion-chamber, and said chamber, Figs. 1 and claim, and which has for its objects the at- 3, has exits gin the top, which are controlled tainment and maintenance of a high temperaby a damper g', operated from Without hy the ture and the avoidance of a nuisance. lever g2, Fig. 1. rFhese openings cc".muni

zo Referring to the accompanying drawings, cate with the space h under the boilers I-I, 7o Figure 1 is a sectional elevation of my furwhich said space communicates atits rear end nace. Fig. 2 is a front elevation of one of with the flues h', passing forwardly through the several furnaces of which the plant is the boilers, said iiues communicating at their composed. Fig. 3isavertical section through forward vends with the spaces h2V above the 25 the front part of the furnace at about the boilers. These upper spaces communicate, 75

' line 3 4E, Fig. 1, and showing parts in eleva- Figs. 1 and 6, with a ue h3, which, dividing tion. Fig. 4 is a section View of the furnace into branches h4, passes, one branch on each on the line 1 2 of Fig. 1. Fig. 5 isa plan of side of the funnel I, which supplies the maone furnace. Fig. 6 is a horizontal section terial to thefurnace-chamher O. Thencethese 3o on the Iine 7 S of Fig. l. Fig. 7 is a section branches pass into a down-lineh, terminatof the right half of the furnace on the line 9 ing in the main flue B, to the stack, Fig. 1. 10 13 of Fig. 1. Fig. 8 is a section of the left Dampers h6 control the branches 71.4 into the half of the furnace on the line 1l 12 10 13 of down-line.

Fig. l. Fig. 9 is an elevation of the inner Above the boilers isthesteam-dome J. An

g5 wall-plate of the side air-passages F. Fig. elevated platform K is used to enable the 85 10 is a detail section of said side air-passages. wagon, car, or other vehicle L, Fig. l, to reach In Fig. 1, A represents the general structhe dump-receptacle M, which receptacle has ture, in the lower portion of which is the main a rear gate m, by which the contents are dispassage or flue B for 4the products of comcharged into the feed-funnel.

4o bustion to the stack. In the lower front of The entrance of the air to the furnace- 9o the structure are the main furnace-chambers chambers and the course of the products of O, one or more in number. As all are alike, distillation and combustion are indicated by a description of one will suffice for the others. the arrows.

In Fig. 2 I have shown in front elevation The material, garbage, or refuse of any de- 45 one of these as closed by the doors c, and in scription is fed to the funnels, and thence 95 Fig. 3 I have shown another in section. Each down into the furn ace-chambers, as indicated. chamber has under its bars an ash-pit D, When the furnaces have to be opened to Figs. 1 and 3, with the usual doors d, Fig. 2.- clean or rake out the ashes, the dampers g E in Fig. 1 is an air-passage from the eX- and hare closed, so that by closing dampers 5o terior, and this communicates, through an g the cold air will not pass into the ues and Ioo l with steam or a steam-jet alone.

vpassages in and around the boilers and cool them, and by closing dampers h6 the heat around said boilers will be retained.

The supply of air or steam jet, or steam and air combined, to assist combustion, is regulated by the damper e.

The prime requisite in a furnace of this class isv high heat. Vithout this there is not perfect combustion and the character of the material to oe consumed is such that in the absence of high heat a partial combustion and distillation takes place, the products of which are inefficient to reach or to maintain the de-v gree of heat necessary for a useful purpose, such as making steam, particularly where the boilers are situated at a distance from the furnaces. Moreover, this partial distillation is offensive, giving rise to odors and vapors, tending to make the furnace a nuisance in the neighborhood. Furthermore, the material is not properly consumed, thus clogging the. furnaces and leaving a waste. The character of the material renders it necessary to obtain a high heat to reach proper combustion. In my furnace this high temperature is attained by a perfect combustion, reducing the material to carbonic-acid gas, ash, and clinker. This temperature or intense heat is gained partly by the provision for the inlet of the air from below and from the sides, and to this end therernay be a forced draft, and either air alone may be used or air combined It is further gained by causing the products of distillation arising from heating up the entering material in the feed-funnel to pass over and in contact with the glowing mass in the furnace-chamber, by which they are thoroughly consumed, and passing upward as highly-heated gases and products of combustion through the heated brick in the arches of the furnace-chambers are further heated and consumed in the combustion-chamber G, and thus highly heated these products are available for the purposel of making steam in the boilers, Which latter, it will be noted, are close to the source of generation of such products, so that none of the heat is lost before being called upon for work. Finally these products, with the amount of heat remaining, are utilized in my furnace to further heat up the entering material in the funnels by passing by and in contactv with said funnels on their Way to the main iiue. This is in marked contrast to a construction which permits the products of distillation from the entering material to escape at once to the main flue without any attempt to heat and consume them. In this case they become a nuisance, being both noisome and nauseous, besides being a waste and resulting in no work, While in my case these products, not being allowed to escape, are conducted through such a course that by contact with all available sources of heatthe burning mass, the heated air, and the heated surfaces of brick and ironthey become themselves highly heated, are capable of parting with their heat for good work of any kind, making steam or other objects requiring heat, assist in raising the temperature of the entering mass, and finally are so consumed that they are discharged without nuisance. In this result the proximity of the boilers to the furnace-chambers is,'as I have before intimated, a potent factor, and they are therefore placed close enough to the furnaces to utilize Ythe available heat, and yet not so close as to destroy, as has been found by experience, the proper or full combustion-that is, the proper union of the elements to make combustion or the combination of the elements of CO2. The heat comes in contact with the clean surfaces of the boilers, and the remaining or waste heat coming from the boilers is, as before stated, used to further distil the entering material by contact with or proximity to the funnel containing it. l

The back plate of the boiler-passages is of iron and is kept hot, and the funnel is of iron and also'hot, but the heat is not great enough to consume the entering material, only to prepare it for combustion by raising its temperature and distilling its products. The arrangement for the supply of material from above saves the cost of lifting and is convenient and practicable. The wall-plates of the side passages F prevent clinkers from attaching to the sides of the furnace-chamber.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a heat-utilizing furnace, the combination with inclosing walls, of a substantially horizontal furnace-chamber having a feedopening at one end and exit-openings in the top wall at the opposite end, a secondary combustiolrchamber over the furnace, and with which the exit-openings communicate, a boiler-chamber over the secondary combustion-chamber and communicating therewith, a boiler in the boiler-chamber, a passage from the boiler-chamber downward into an exit and a feed-funnel in proximity to said last mentioned passage leading into the furnace, substantially as described.

2. In a heat-utilizing garbage-furnace, the combination with a substantially horizontally arranged furnace-chamber having an inclined grate therein, a feed-funnel entering the rear of the furnace, exit-openings in the top of the furnace at the forward end thereof, a boiler-chamber arranged directly over the furnace into which the exit-openings lead, means in the boiler-chamber for causing the heated products of combustion to pass tortuously to the boiler-chamber and an exit-flue from the boiler-chamber extending in close heating proximity to the mouth of the funnel, substantially as described.

3. In a heat-utilizing furnace, the combination of the inclosing Walls, a substantially horizontal furnace-chamber near the bottom of the furnace closed at one end and open at the other, an inclined feed-funnel at the rear IOO IOS

IIO

of the Jfurnace and communicating with the open end of the furnace-chamber and located within and spaced from the side inclosing walls to form passages on opposite sides of the funnel, a boiler-chamber located within the inclosing Walls above the furnace-chamber and communicating Vtherewith by means of openings in the roof of the furnace-chamber, said boiler-chamber communicating directly With said passages beside the feed-funnel, substantially as described.

4. In a heat-utilizing furnace, the combination of the inclosing Walls, an inclined grate or partition constituting the bottom of the furnace-chamber, an inclined arched Wall con* stituting the roof` of said furnace-chamber, an inclined feed-funnel communicating with one end of the furnace-chamber and located In Witness whereof I have hereunto set my 3o hand.

JOHN C. I-I. STUT.

Witnesses:

WALTER F. VANE, D. B. RICHARDS. 

